Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)
History

Fri, 19 Jun 2026 12:15:00 +0000

Type Values Removed Values Added
Title Site Isolation Bypass via Malicious Renderer Process in Chrome Extensions chromium-browser: chromium-browser: Insufficient data validation in Extensions
Weaknesses CWE-653
References
Metrics threat_severity

None

threat_severity

Important


Thu, 18 Jun 2026 23:45:00 +0000

Type Values Removed Values Added
Title Site Isolation Bypass via Malicious Renderer Process in Chrome Extensions

Thu, 18 Jun 2026 22:30:00 +0000

Type Values Removed Values Added
Title Chrome Extension Renderer Process Exploitation Allows Site Isolation Bypass
Weaknesses CWE-284

Thu, 18 Jun 2026 04:45:00 +0000

Type Values Removed Values Added
Title Chrome Extension Renderer Process Exploitation Allows Site Isolation Bypass
Weaknesses CWE-284
CWE-693
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 17 Jun 2026 07:00:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome

Wed, 17 Jun 2026 05:15:00 +0000

Type Values Removed Values Added
Description Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published: 2026-06-17T01:38:20.661Z

Updated: 2026-06-17T13:14:47.588Z

Reserved: 2026-06-16T19:38:30.420Z

Link: CVE-2026-12457

cve-icon Vulnrichment

Updated: 2026-06-17T13:14:44.313Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Important

Publid Date: 2026-06-17T01:38:20Z

Links: CVE-2026-12457 - Bugzilla